Aptitude - Problems on H.C.F and L.C.M - Discussion
Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 13)
13.
| Reduce | 128352 | to its lowest terms. |
| 238368 |
Answer: Option
Explanation:
128352) 238368 ( 1
128352
---------------
110016 ) 128352 ( 1
110016
------------------
18336 ) 110016 ( 6
110016
-------
x
-------
So, H.C.F. of 128352 and 238368 = 18336.
128352 128352 ÷ 18336 7
Therefore, ------ = -------------- = --
238368 238368 ÷ 18336 13
Discussion:
59 comments Page 5 of 6.
Shahul said:
1 decade ago
Hi sona,
Why you didn't subtract 110016-18336?
Why you stop'd subtracting the above values?
Why you didn't subtract 110016-18336?
Why you stop'd subtracting the above values?
Pankaj said:
1 decade ago
Please somebody answer why after we have to stop subtracting after.
18336?
18336?
Vanaja said:
1 decade ago
@Sona thanks.
Seema said:
1 decade ago
Check the ones digit of numerator & denominator. It must come in the table of answer digit at ones place. It will fewer your option.
Then check numerator is fully divided by numerator & denominator by denominator.
Then check numerator is fully divided by numerator & denominator by denominator.
Ammu said:
1 decade ago
We have to stop subtracting when the result becomes negative.
128352-110016 = 18336.
18336-110016 = negative number.
128352-110016 = 18336.
18336-110016 = negative number.
PRASANNA said:
8 years ago
Go with options.
Check whether numerator and denominator both are divisible by values given in option.
Here only 3/4 and 7/13 satisfy the condition.
Now apply logic to get the answer (here denominator (238368) is approx. Double of numerator(128352) Hence 7/12 is answer as denominator (13) is approx. Double of numerator(7).
Check whether numerator and denominator both are divisible by values given in option.
Here only 3/4 and 7/13 satisfy the condition.
Now apply logic to get the answer (here denominator (238368) is approx. Double of numerator(128352) Hence 7/12 is answer as denominator (13) is approx. Double of numerator(7).
Shraddha said:
1 decade ago
Find the factors of 128352.
Then find the factors of 238368.
Cancel out the common factors.
It leads to the ratio of uncommon factors, i.e. 7/13, which is the lowest ratio.
Then find the factors of 238368.
Cancel out the common factors.
It leads to the ratio of uncommon factors, i.e. 7/13, which is the lowest ratio.
Ambica said:
1 decade ago
Why are we subtracting?
Soumen said:
1 decade ago
Simple check option A.
3*1 = 3....128352 not match the last number i.e. 3&2.
3*2 = 6....128352 not match the last number i.e. 3&2.
...
3*4 = 12...128352 now match the last number i.e. 2&2.
Now 4*4 = 16...238368 not match the last number i.e. 6&8.
Check option C.
7*6 = 42....128352 now match the last number i.e. 2&2.
Now 13*6 = 78...238368 now match the last number i.e. 8&8.
3*1 = 3....128352 not match the last number i.e. 3&2.
3*2 = 6....128352 not match the last number i.e. 3&2.
...
3*4 = 12...128352 now match the last number i.e. 2&2.
Now 4*4 = 16...238368 not match the last number i.e. 6&8.
Check option C.
7*6 = 42....128352 now match the last number i.e. 2&2.
Now 13*6 = 78...238368 now match the last number i.e. 8&8.
Sandeep said:
1 decade ago
Hey, someone check option A.
You have checked---as-3*4 = Match the last number.
But why dint you check 4*2 this also match the last no 238368--match found, but option A is not true.
You have checked---as-3*4 = Match the last number.
But why dint you check 4*2 this also match the last no 238368--match found, but option A is not true.
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